ORA-42907
Cannot apply OLS policy with a labeling function when Oracle Database Vault operations control is enabled.
Cause
An attempt was made to apply an Oracle Label Security (OLS) policy with a labeling function when Oracle Database Vault operations control was enabled. This error also occurs when and OLS policy with a function is already applied and then the Oracle Database Vault operations control is enabled.
Action
If Oracle Database Vault operations control is necessary, then an OLS policy cannot be applied with a labeling function.