asp.net mvc - A dependent property in a ReferentialConstraint is mapped to a store-generated column. Column: -


i having 2 table 

[tblmaincheckpoint](     [id] [int] identity(1,1) not null,     [checkpointname] [nchar](100) null,     [checkpointdescription] [nchar](1000) null )

and 

 [dbo].[tblsubcheckpoint](     [subcheckpointid] [int] identity(1,1) not null,     [maincheckpointid] [int] not null,     [subcheckpointname] [nchar](500) null ) on [primary]

id maincheckpoint primary key , maincheckpointid foreign key in subcheckpoint table

whenever trying save subcheckpoint entity throws below error

"a dependent property in referentialconstraint mapped store-generated column. column: 'subcheckpointid'."

i dont want set subcheckpointid manually code made identity column in database throws error.

please me


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