Data Issue

[Somnath Som <somnath.som@xxxxxxxxxxxx>]

When trying to insert data in a table then getting below error, someone can guide me please how to resolve the issue.

 

Error: insert or update on table "site" violates foreign key constraint "reg_fkey"
DETAIL:  Key (region)=() is not present in table "region".
Traceback (most recent call last):