cannot pull nor push

[Uwe Brauer]

Hi 

The following is very odd:

 I run hg push and receive 

searching for changes
remote has heads on branch 'default' that are not known locally: 04d767379c2a
abort: push creates new remote head 3f146ed989ef!
(pull and merge or see 'hg help push' for details about pushing new heads)
 

Fine, a collaborator had pushed already and my push would create a
remote additional head.

So I tried to do what I am always doing

 hg pull -u and then 
 hg merge

*BUT* 

hg pull -u gave me 


pulling from https://oubmatucmes@helixteamhub.cloud/broad-rain-1388/projects/bibliography/repositories/mercurial/bib
searching for changes
adding changesets
adding manifests
adding file changes
transaction abort!
rollback completed
abort: rejecting publishing of changeset 04d767379c2a


What the heck is this?


Any ideas?

Regards

Uwe Brauer