ORA-53060
string is not a standard attribute tag
Cause
The operation failed because the specified standard dictionary attribute tag did not have an even group number.
Action
A standard dictionary attribute tag represents a two-byte hexadecimal number (group number followed by element number) and must match the regular expression [0-9a-fA-FxX]{3}[02468aceACExX]{1}[0-9a-fA-FxX]{4}. Correct the attribute tag format and try the operation again.