[Localization] Pushing translations to 5.15.2

[Josep Ma. Ferrer]

Hello,

i'm trying to push some Catalan translation files to 5.15.2 to solve 
some typos.

But, gpush command says:

~/traduc/qt/qttranslations/translations$ git gpush :1

Pushing 1 Change(s) for 5.15.2 to 'origin':
   Idb8439908 (Catalan translations for 5.15.2)  [NEW]
Enumerating objects: 17, fet.
S'estan comptant els objectes: 100% (17/17), fet.
Delta compression using up to 6 threads
S'estan comprimint els objectes: 100% (9/9), fet.
S'estan escrivint els objectes: 100% (9/9), 1.71 KiB | 1.71 MiB/s, fet.
Total 9 (delta 8), reused 0 (delta 0)
remote: Resolving deltas: 100% (8/8)
remote: error: branch refs/for/5.15.2:
remote: You need 'Create Change' rights to upload code review requests.
remote: Verify that you are pushing to the right branch.
remote: User: txemaq
remote: Contact an administrator to fix the permissions
remote: Processing changes: refs: 1, done
To ssh://codereview.qt-project.org/qt/qttranslations.git
  ! [remote rejected] 6afd8159b72dc22f8045b39e75aba9cdc5439569 -> 
refs/for/5.15.2 (prohibited by Gerrit: not permitted: create change on 
refs/heads/5.15.2)
error: s'ha produït un error en pujar algunes referències a 
«ssh://txemaq@codereview.qt-project.org/qt/qttranslations.git»

* ---------------*

Can we push to 5.15.2 branch?

If don't, how we can modify some translations on 5.15?

Thanks in advance,

Josep Ma. Ferrer