It's a A06MSCFPL2 for a CPMT21.5_ style insert but you're using a CCMT 21.5_ insert in a worn-out pocket, so the insert seated all the way down. The carbide shank tool replacement is the same as you've already been using except for the lead angle on the pocket. So now, the insert does not fit the new pocket because the 11-degree pocket will not accept a 7-degree insert.
What do you do?
Try a Seco bar E06SCLCL2 for a CCMT21.5_ insert and let us know how that works.
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