The3rd Earl Of Derby wrote:

Its a bit like laying laminate, you cant take the middle piece up. :-)

You can if you need to...

Circular saw a rectangle out of the centre of the board - leaving a
narrow margin of the board glued to the remainder.

Use a bolster chisel at an angle to break the endges of the board into
the cut out section (i.e. away from the glue joint).

Remove the bottom of the grove on the side and edge of the new board,
and glue back into place.

--
Cheers,

John.

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