SPL1126: "%s:E(L%d), Illegal attempt to modify %s field in diagnostics area."
The user attempted to change the values of CONDITION_NUMBER, RETURNED_SQLSTATE, CONDITION_IDENTIFIER, or MESSAGE_LENGTH in a SIGNAL or RESIGNAL statement, which is not allowed. The user may also have attempted to modify CLASS_ORIGIN or SUBCLASS_ORIGIN in a SIGNAL or RESIGNAL statement when an SQLSTATE value is used or a condition name is used that has an associated SQLSTATE value. The %s contains any one of the above condition information items.
Correct the SIGNAL or RESIGNAL statement based on the field mentioned in the error message and resubmit the stored procedure for compilation.