Internal turning in a blind hole brings about the problem of chip exit. When the tool reaches the rear side wall, chips may be caught between the wall and the insert, possibly causing insert breakage.

Two solutions that can eliminate this problem:
First Solution
Start by grooving at the rear wall.
Continue by turning from the inside towards the outside.

Second Solution
Start by grooving at the rear wall.
Pull the tool back to the outside.
Turn the final diameter from outside towards the groove.