cubicweb-seda #13812926 Delete profile doesn't work [rejected]

When I want delete a profile, an error occurs : "Internal Server Error The server encountered an unexpected internal server error (generated by waitress)"

https://demo.logilab.fr/seda/sedaarchivetransfer/32158?vid=deleteconf

prioritynormal
typebug
done in0.4.0
load0.000
load left0.000
closed by<not specified>