There is a way to rename constraint that have not a name?

I have a database with a no name constraint primary key in many tables.

I learned my lesson and I would repair to this situation.

There is a simple way to assign a name to all no name constraints?

Like this statement:

UPDATE
rdb$relation_constraints
SET
rdb$constraint_name = 'MyPrimaryKeyName'
WHERE
rdb$relation_name = MyTable
AND rDB$CONSTRAINT_TYPE = 'PRIMARY KEY'

There are contraindications?

Thanks
--

Luigi Siciliano
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