yams #139999 assertion error: prefix already defined [validation pending]

Calling XYRegistry.register_prefix() can stop on AssertionError if the same exact prefix is defined twice. It should only break if an existing prefix is being changed.

prioritynormal
typebug
done in0.38.0
load0.100
load left0.000
closed by#e38902402af5 [xy] fail assertion only if existing prefix is being changed (closes #139999)
patch[xy] fail assertion only if existing prefix is being changed (closes #139999) [applied]