CRCPC2166E
The "{0}" {0,keyword,product} configuration cannot be deleted because it is the only version and it is used by the checked in "{1}" {0,keyword,product}.

Explanation

A {0,keyword,product} configuration can only be deleted if: (1) it is modifiable and (2) if it is the only version, it is not used as a child of a checked in {0,keyword,product}.
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