ORA-04091: table string.string is mutating, trigger/function may not see it

admin

ORA-04091: table string.string ismutating, trigger/function may not see it
Cause: Atrigger (or a user defined plsql function that is referenced in this
statement) attempted to look at (or modify) a table that was in the middle ofbeing
modified by the statement which fired it.
Action: Rewritethe trigger (or function) so it does not read that table.