Game records marked as PGN error remain marked after deletion and insertion.

[RogerMarsh]

The situation can be set up by: importing a few games, editing one of them to introduce an illegal move, deleting the game, and inserting one minimal new game with legal moves.

The edited game appeared on the 'Error' selection before deletion and the inserted replacement appears on the 'Error' selection too.

Subsequent game insertions do not appear on the 'Error' selection unless the game has PGN errors.

[RogerMarsh]

ChessTab versions 8.0, 8.0.1, and 8.0.2, suffer this problem

[RogerMarsh]

If py-lmdb is managing the database an exception occurs when attempting to delete the game with PGN errors because a zero length key is involved.