ORA-06571: Function string does not guarantee not to update database

Cause: There are two possible causes for this message:
 * A SQL statement references a packaged, PL/SQL function that does not contain a pragma that prevents the database from being updated.

* A SQL statement references a stand-alone, PL/SQL function that contains an instruction to update the database.

Action: If the referenced function is a packaged, PL/SQL function: Recreate the PL/SQL function with the required pragma; be certain to include the ‘Write No Database State’ (WNDS) argument in the argument list of the pragma. If the referenced function is a stand-alone, PL/SQL function: Do not use the function.

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