0 - 3 of 3 tags for Constraint

This error was received after executing the following DDL statement for bitemporal table:
 

Hi,
 
I'm logged in with dbc user.
I'm ALTERing a table to add Foreign Key Constraint with Following statement
ALTER TABLE testdb.Master2 ADD CONSTRAINT fk_Master1 FOREIGN KEY (Master1ID) REFERENCES testdb.Master1(Master1ID);
its works fine.
But when i write this in a procedure

Hi,
 
I want to Update a table. But before that i want disable foreign key\check Constraint\Unique Key on some tables.
After update, i want to enable those disables constraint again.
 
Can you please tell me how can i do that.
 
Parth