Table Replica

Transact-SQL
1

I have one table with some check constraint and it is not allowing me to insert data if i do not pass the values for check constraint.

I have created the replica of that table with check constraint and passing null as check constrainit it is allowing me to insert data

How is that possible, please suggest

2

Show us the DDL for both tables, including the constraints. There is something different. Probably one has NOT NULL, and the other is NULL.