Plone 5.1b3 update from 5.0.5 fails on update_social_media_fields

[hvelarde]

that issue was first reported here:

Plone 5.1b3 soft-released

Hello Eric! We were on Plone 5.1b2 before and after upgrading to 5.1b3 we have noticed two problems: The upgrade in the Plone configuration fails because the upgrade step Update social media fields gives an error: Traceback (innermost last): Module ZPublisher.Publish, line 138, in publish Module ZPublisher.mapply, line 77, in mapply Module ZPublisher.Publish, line 48, in call_object Module Products.GenericSetup.tool, line 1053, in manage_doUpgrades Module Products.GenericSetup.upgrade,…

I'm still waiting for help to solve it.