Violation of PRIMARY KEY constraint i reonstructed tabel, men der er ingen dubletter

En større tabel er blevet reconstructed /repareret af en ældre tabel og stumper vha Data compare.

Tabellen tillader nu ikke at man tilføjer nye records:

Violation of PRIMARY KEY constraint 'PK_tblArt'. Cannot insert duplicate key in object 'tblStones'.


Tabellen ser kort sådan ud:

CREATE TABLE [dbo].[tblStones](
..
    [StoneAdded] [datetime] NULL CONSTRAINT [DF_tblStones_StoneAdded]  DEFAULT (getdate()),
..
CONSTRAINT [PK_tblArt] PRIMARY KEY CLUSTERED
(
    [StoneID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]


Der er et fremmede nøgler:
ALTER TABLE [dbo].[tblStones]  WITH NOCHECK ADD  CONSTRAINT [FK_tblStones_tblArtists] FOREIGN KEY([StoneArtistID])
REFERENCES [dbo].[tblArtists] ([ArtistID])
GO
ALTER TABLE [dbo].[tblStones] CHECK CONSTRAINT [FK_tblStones_tblArtists]
GO
ALTER TABLE [dbo].[tblStones]  WITH NOCHECK ADD  CONSTRAINT [FK_tblStones_tblStoneCategory] FOREIGN KEY([StoneCategoryID])
REFERENCES [dbo].[tblStoneCategory] ([StoneCategoryID])
GO
ALTER TABLE [dbo].[tblStones] CHECK CONSTRAINT [FK_tblStones_tblStoneCategory]
----------

SELECT StoneID,  count(*) as antal
FROM [dbo].[tblStones]
GROUP BY StoneID
HAVING count(*) > 1

Giver ingen dubletter. Jeg har prøvet at rekonstruere nøgle uden problemer. Forslag til løsning søges.