Error 1831: Duplicate index defined on the table. This is deprecated and will be disallowed in a future release.

Error Code	SQLSTATE	Error	Description
1831	HY000	ER_DUP_INDEX	Duplicate index '%s' defined on the table '%s.%s'. This is deprecated and will be disallowed in a future release.

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↑ MariaDB Error Codes 1800 to 1899 ↑
Error 1800: Unknown ALGORITHM
Error 1801: Unknown LOCK type
Error 1802: CHANGE MASTER cannot be executed when the slave was stopped with an error or killed in MTS mode
Error 1803: Cannot recover after SLAVE errored out in parallel execution mode
Error 1804: Cannot clean up worker info tables
Error 1805: Column count of is wrong. Expected, found. The table is probably corrupted
Error 1806: Slave must silently retry current transaction
Error 1807: There is a foreign key check running on table
Error 1808: Schema mismatch
Error 1809: Table in system tablespace
Error 1810: IO Read error
Error 1811: IO Write error
Error 1812: Tablespace is missing for table
Error 1813: Tablespace for table exists. Please DISCARD the tablespace before IMPORT
Error 1814: Tablespace has been discarded for table
Error 1815: Internal error
Error 1816: ALTER TABLE IMPORT TABLESPACE failed with error
Error 1817: Index corrupt
Error 1818: YEAR(%lu) column type is deprecated. Creating YEAR(4) column instead.
Error 1819: Your password does not satisfy the current policy requirements
Error 1820: You must SET PASSWORD before executing this statement
Error 1821: Failed to add the foreign key constaint. Missing index for constraint in the foreign table
Error 1822: Failed to add the foreign key constaint. Missing index for constraint in the referenced table
Error 1823: Failed to add the foreign key constraint to system tables
Error 1824: Failed to open the referenced table
Error 1825: Failed to add the foreign key constraint on table. Incorrect options in FOREIGN KEY constraint
Error 1826: Duplicate foreign key constraint name
Error 1827: The password hash doesn't have the expected format
Error 1828: Cannot drop column: needed in a foreign key constraint
Error 1829: Cannot drop column: needed in a foreign key constraint of table
Error 1830: Column cannot be NOT NULL: needed in a foreign key constraint SET NULL
Error 1831: Duplicate index defined on the table. This is deprecated and will be disallowed in a future release.
Error 1832: Cannot change column: used in a foreign key constraint
Error 1833: Cannot change column: used in a foreign key constraint of table
Error 1834: Cannot delete rows from table which is parent in a foreign key constraint of table
Error 1835: Malformed communication packet.
Error 1836: Running in read-only mode
Error 1837: When GTID_NEXT is set to a GTID, you must explicitly set it again after a COMMIT or ROLLBACK
Error 1838: The system variable cannot be set in stored procedures
Error 1839: @@GLOBAL.GTID_PURGED can only be set when @@GLOBAL.GTID_MODE = ON
Error 1840: @@GLOBAL.GTID_PURGED can only be set when @@GLOBAL.GTID_EXECUTED is empty
Error 1841: @@GLOBAL.GTID_PURGED can only be set when there are no ongoing transactions (not even in other clients)
Error 1842: @@GLOBAL.GTID_PURGED was changed from to
Error 1843: @@GLOBAL.GTID_EXECUTED was changed from to
Error 1844: Cannot execute statement: impossible to write to binary log since BINLOG_FORMAT = STATEMENT, and both replicated and non replicated tables are written to
Error 1845: is not supported for this operation. Try
Error 1846: is not supported. Reason: Try
Error 1847: COPY algorithm requires a lock
Error 1848: Partition specific operations do not yet support LOCK/ALGORITHM
Error 1849: Columns participating in a foreign key are renamed
Error 1850: Cannot change column type INPLACE
Error 1851: Adding foreign keys needs foreign_key_checks=OFF
Error 1852: Creating unique indexes with IGNORE requires COPY algorithm to remove duplicate rows
Error 1853: Dropping a primary key is not allowed without also adding a new primary key
Error 1854: Adding an auto-increment column requires a lock
Error 1855: Cannot replace hidden FTS_DOC_ID with a user-visible one
Error 1856: Cannot drop or rename FTS_DOC_ID
Error 1857: Fulltext index creation requires a lock
Error 1858: sql_slave_skip_counter can not be set when the server is running with @@GLOBAL.GTID_MODE = ON
Error 1859: Duplicate entry for key
Error 1860: Long database name and identifier for object resulted in path length exceeding characters
Error 1861: cannot silently convert NULL values, as required in this SQL_MODE
Error 1862: Your password has expired. To log in you must change it using a client that supports expired passwords
Error 1863: Found a row in wrong partition
Error 1864: Cannot schedule event, relay-log name, position to Worker thread because its size exceeds of slave_pending_jobs_size_max
Error 1865: Cannot CREATE FULLTEXT INDEX WITH PARSER on InnoDB table
Error 1866: The binary log file is logically corrupted
Error 1867: file was not purged because it was being read by thread(s), purged only out of
Error 1868: file was not purged because it is the active log file
Error 1869: Auto-increment value in UPDATE conflicts with internally generated values
Error 1870: Row events are not logged for statements that modify BLACKHOLE tables in row format
Error 1871: Slave failed to initialize master info structure from the repository
Error 1872: Slave failed to initialize relay log info structure from the repository
Error 1873: Access denied trying to change to user (using password). Disconnecting.
Error 1874: InnoDB is in read only mode
Error 1875: STOP SLAVE command execution is incomplete: Slave SQL thread got the stop signal
Error 1876: STOP SLAVE command execution is incomplete: Slave IO thread got the stop signal
Error 1877: Operation cannot be performed. The table is missing, corrupt or contains bad data
Error 1878: Temporary file write failure
Error 1879: Upgrade index name failed, please use create index(alter table) algorithm copy to rebuild index
Error 1880: "

Error 1831: Duplicate index defined on the table. This is deprecated and will be disallowed in a future release.

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