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Asked: May 11, 20262026-05-11T23:37:02+00:00 2026-05-11T23:37:02+00:00

I have no code behind and the above error keep prompting on INSERT. The

I have no code behind and the above error keep prompting on INSERT. The DBML is refresh!

Exception Details: System.Data.Linq.DuplicateKeyException: Cannot add an entity with a key that is already in use.

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