ALTER TABLE statement conflicted with the FOREIGN KEY constraint

Server Type - MS SQL  Server

Scanerio : Error faced when tried to apply foreign key constraint on table having data in it (non empty table).

Error

Msg 547, Level 16, State 0, Line 20 The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "". The conflict occurred in database "", table "dbo.", column '**'

Solution

Empty table first then apply foreign key