We have these z3c packages in 6.1.1:
'/home/plone/zchl_buildout/eggs/z3c.jbot-2.2-py3.12.egg',
'/home/plone/zchl_buildout/eggs/collective.z3cform.datagridfield-3.0.4-py3.12.egg',
'/home/plone/zchl_buildout/eggs/z3c.pt-4.4-py3.12.egg',
'/home/plone/zchl_buildout/eggs/z3c.relationfield-2.0.0-py3.12.egg',
'/home/plone/zchl_buildout/eggs/plone.app.z3cform-4.7.4-py3.12.egg',
'/home/plone/zchl_buildout/eggs/z3c.zcmlhook-2.0-py3.12.egg',
'/home/plone/zchl_buildout/eggs/plone.z3cform-2.0.4-py3.12.egg',
'/home/plone/zchl_buildout/eggs/z3c.form-5.1-py3.12.egg',
'/home/plone/zchl_buildout/eggs/z3c.caching-3.0-py3.12.egg',
'/home/plone/zchl_buildout/eggs/z3c.objpath-2.0-py3.12.egg',
'/home/plone/zchl_buildout/eggs/z3c.formwidget.query-2.0.0-py3.12.egg',
'/home/plone/zchl_buildout/eggs/z3c.unconfigure-2.1-py3.12.egg',
This change in 6.1.2 is unexpected and a breaking change from what I see.