I find there is a bug in Contract Command. I runs the following code in version 8.1.0, and it seems also exit in FeynCalc 8.2.0
In:= Contract[(FV[p1, mu2] - FV[pJ, mu2])*FV[k2, mu1]*FV[pJ, af]]
Out= Contract(p1^mu2-pJ^mu2,pJ^af k2^mu1,Contract3->False).
Is it possible to remove the Contract3->False?
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