Wikimedia Bugzilla is closed!

"  File "C:\pywikibot\core\pywikibot\page.py", line 2692, in addClaim
    self.repo.addClaim(self, claim, bot=bot, **kwargs)
  File "C:\pywikibot\core\pywikibot\site.py", line 709, in callee
    return fn(self, *args, **kwargs)
  File "C:\pywikibot\core\pywikibot\site.py", line 3581, in addClaim
    data = req.submit()
  File "C:\pywikibot\core\pywikibot\data\api.py", line 394, in submit
    raise APIError(code, info, **result["error"])
pywikibot.data.api.APIError: internal_api_error_ReadOnlyError: Exception Caught:
 The database is currently locked to new entries and other modifications, probab
ly for routine database maintenance, after which it will be back to normal.

The administrator who locked it offered this explanation: The database has been
automatically locked while the slave database servers catch up to the master

"

Should back off and retry