Unable to lock user! from J2EE visual admin

Hi All,

J2EE_GUEST user in my PI server had been locked and I couldn't unlock it from J2EE visual administrator, and the error is as below :

com.sap.security.core.server.userstore.UserstoreException: Could not write user property for user UACC.R3_DATASOURCE.PISUPER

Caused by: com.sap.security.core.persistence.datasource.PersistenceException: Attribute "lockreason" on namespace "com.sap.security.core.usermanagement" of principal "UACC.R3_DATASOURCE.PISUPER" is not modifiable.

Please come up with solution.....

Regards,

Venkat Titumalasetti