# MariaDB Error Codes 1800 to 1899

- [Error 1800: Unknown ALGORITHM](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1800.md)
- [Error 1801: Unknown LOCK type](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1801.md)
- [Error 1802: CHANGE MASTER cannot be executed when the slave was stopped with an error or killed in M](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1802.md)
- [Error 1803: Cannot recover after SLAVE errored out in parallel execution mode](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1803.md)
- [Error 1804: Cannot clean up worker info tables](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1804.md)
- [Error 1805: Column count of is wrong. Expected, found. The table is probably corrupted](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1805.md)
- [Error 1806: Slave must silently retry current transaction](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1806.md)
- [Error 1807: There is a foreign key check running on table](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1807.md)
- [Error 1808: Schema mismatch](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1808.md)
- [Error 1809: Table in system tablespace](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1809.md)
- [Error 1810: IO Read error](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1810.md)
- [Error 1811: IO Write error](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1811.md)
- [Error 1812: Tablespace is missing for table](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1812.md)
- [Error 1813: Tablespace for table exists. Please DISCARD the tablespace before IMPORT](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1813.md)
- [Error 1814: Tablespace has been discarded for table](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1814.md)
- [Error 1815: Internal error](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1815.md)
- [Error 1816: ALTER TABLE IMPORT TABLESPACE failed with error](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1816.md)
- [Error 1817: Index corrupt](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1817.md)
- [Error 1818: YEAR(%lu) column type is deprecated. Creating YEAR(4) column instead.](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1818.md)
- [Error 1819: Your password does not satisfy the current policy requirements](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1819.md)
- [Error 1820: You must SET PASSWORD before executing this statement](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1820.md)
- [Error 1821: Failed to add the foreign key constaint. Missing index for constraint in the foreign tab](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1821.md)
- [Error 1822: Failed to add the foreign key constaint. Missing index for constraint in the referenced](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1822.md)
- [Error 1823: Failed to add the foreign key constraint to system tables](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1823.md)
- [Error 1824: Failed to open the referenced table](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1824.md)
- [Error 1825: Failed to add the foreign key constraint on table. Incorrect options in FOREIGN KEY cons](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1825.md)
- [Error 1826: Duplicate foreign key constraint name](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1826.md)
- [Error 1827: The password hash doesn't have the expected format](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1827.md)
- [Error 1828: Cannot drop column: needed in a foreign key constraint](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1828.md)
- [Error 1829: Cannot drop column: needed in a foreign key constraint of table](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1829.md)
- [Error 1830: Column cannot be NOT NULL: needed in a foreign key constraint SET NULL](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1830.md)
- [Error 1831: Duplicate index defined on the table. This is deprecated and will be disallowed in a fut](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1831.md)
- [Error 1832: Cannot change column: used in a foreign key constraint](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1832.md)
- [Error 1833: Cannot change column: used in a foreign key constraint of table](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1833.md)
- [Error 1834: Cannot delete rows from table which is parent in a foreign key constraint of table](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1834.md)
- [Error 1835: Malformed communication packet.](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1835.md)
- [Error 1836: Running in read-only mode](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1836.md)
- [Error 1837: When GTID\_NEXT is set to a GTID, you must explicitly set it again after a COMMIT or ROLL](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1837.md)
- [Error 1838: The system variable cannot be set in stored procedures](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1838.md)
- [Error 1839: @@GLOBAL.GTID\_PURGED can only be set when @@GLOBAL.GTID\_MODE = ON](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1839.md)
- [Error 1840: @@GLOBAL.GTID\_PURGED can only be set when @@GLOBAL.GTID\_EXECUTED is empty](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1840.md)
- [Error 1841: @@GLOBAL.GTID\_PURGED can only be set when there are no ongoing transactions (not even in](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1841.md)
- [Error 1842: @@GLOBAL.GTID\_PURGED was changed from to](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1842.md)
- [Error 1843: @@GLOBAL.GTID\_EXECUTED was changed from to](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1843.md)
- [Error 1844: Cannot execute statement: impossible to write to binary log since BINLOG\_FORMAT = STATEM](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1844.md)
- [Error 1845: is not supported for this operation. Try](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1845.md)
- [Error 1846: is not supported. Reason: Try](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1846.md)
- [Error 1847: COPY algorithm requires a lock](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1847.md)
- [Error 1848: Partition specific operations do not yet support LOCK/ALGORITHM](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1848.md)
- [Error 1849: Columns participating in a foreign key are renamed](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1849.md)
- [Error 1850: Cannot change column type INPLACE](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1850.md)
- [Error 1851: Adding foreign keys needs foreign\_key\_checks=OFF](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1851.md)
- [Error 1852: Creating unique indexes with IGNORE requires COPY algorithm to remove duplicate rows](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1852.md)
- [Error 1853: Dropping a primary key is not allowed without also adding a new primary key](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1853.md)
- [Error 1854: Adding an auto-increment column requires a lock](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1854.md)
- [Error 1855: Cannot replace hidden FTS\_DOC\_ID with a user-visible one](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1855.md)
- [Error 1856: Cannot drop or rename FTS\_DOC\_ID](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1856.md)
- [Error 1857: Fulltext index creation requires a lock](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1857.md)
- [Error 1858: sql\_slave\_skip\_counter can not be set when the server is running with @@GLOBAL.GTID\_MODE](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1858.md)
- [Error 1859: Duplicate entry for key](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1859.md)
- [Error 1860: Long database name and identifier for object resulted in path length exceeding character](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1860.md)
- [Error 1861: cannot silently convert NULL values, as required in this SQL\_MODE](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1861.md)
- [Error 1862: Your password has expired. To log in you must change it using a client that supports exp](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1862.md)
- [Error 1863: Found a row in wrong partition](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1863.md)
- [Error 1864: Cannot schedule event, relay-log name, position to Worker thread because its size exceed](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1864.md)
- [Error 1865: Cannot CREATE FULLTEXT INDEX WITH PARSER on InnoDB table](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1865.md)
- [Error 1866: The binary log file is logically corrupted](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1866.md)
- [Error 1867: file was not purged because it was being read by thread(s), purged only out of](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1867.md)
- [Error 1868: file was not purged because it is the active log file](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1868.md)
- [Error 1869: Auto-increment value in UPDATE conflicts with internally generated values](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1869.md)
- [Error 1870: Row events are not logged for statements that modify BLACKHOLE tables in row format](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1870.md)
- [Error 1871: Slave failed to initialize master info structure from the repository](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1871.md)
- [Error 1872: Slave failed to initialize relay log info structure from the repository](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1872.md)
- [Error 1873: Access denied trying to change to user (using password). Disconnecting.](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1873.md)
- [Error 1874: InnoDB is in read only mode](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1874.md)
- [Error 1875: STOP SLAVE command execution is incomplete: Slave SQL thread got the stop signal](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1875.md)
- [Error 1876: STOP SLAVE command execution is incomplete: Slave IO thread got the stop signal](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1876.md)
- [Error 1877: Operation cannot be performed. The table is missing, corrupt or contains bad data](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1877.md)
- [Error 1878: Temporary file write failure](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1878.md)
- [Error 1879: Upgrade index name failed, please use create index(alter table) algorithm copy to rebuil](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1879.md)
- [Error 1880: "](/docs/server/reference/error-codes/mariadb-error-codes-1800-to-1899/e1880.md)