FALSE Hl# Error updating databaseCause javasqlSQLException ORA-01407cannot updateECS2_CONTRACT2_DEV KL_SAP_APPLYVERSION_NUMBERto NULL这个报错是什么问题

This error is related to a database update operation where the system is trying to update a column named "VERSION_NUMBER" in a table named "KL_SAP_APPLY" in the "ECS2_CONTRACT2_DEV" schema. The error message "ORA-01407: cannot update to NULL" indicates that the update operation is trying to set the "VERSION_NUMBER" column to NULL, which is not allowed according to the database schema definition. It is a constraint violation error, and it means that the column is defined as "NOT NULL", so it cannot be updated with a NULL value