Tag condition protected bug

[sn6uv]

Came across this example when trying to load the `KnotTheory`` package http://katlas.org/

In[1]:= BR[TorusKnot[m_, n_]] /; m > 0 && n > 0 := BR[n, Flatten[Table[Range[n - 1], {m}]]]
 : Tag Condition in BR[TorusKnot[m_, n_]] /; m > 0 && n > 0 is Protected.
Out[1]= $Failed