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MySQL error code

MySQL error 3800

MySQL server error 3800 is ER_FUNCTIONAL_INDEX_ROW_VALUE_IS_NOT_ALLOWED, reported with SQLSTATE HY000.

Expression of functional index '%s' cannot refer to a row value.
Error3800
NameER_FUNCTIONAL_INDEX_ROW_VALUE_IS_NOT_ALLOWED
SQLSTATEHY000
GroupServer errors

Source: MySQL 8.4 Error Reference