```
File "C:\Users\admin\Documents\core\pywikibot\bot.py", line 1527, in run
super(Bot, self).run()
File "C:\Users\admin\Documents\core\pywikibot\bot.py", line 1399, in run
for item in self.generator:
File "C:\Users\admin\Documents\core\pywikibot\pagegenerators.py", line 2265, in PreloadingEntityGenerator
for i in repo.preload_entities(group, groupsize):
File "C:\Users\admin\Documents\core\pywikibot\site\__init__.py", line 7975, in preload_entities
page.get() # cannot provide get_redirect=True (T145971)
File "C:\Users\admin\Documents\core\pywikibot\page\__init__.py", line 4857, in get
data = super(ItemPage, self).get(force, *args, **kwargs)
File "C:\Users\admin\Documents\core\pywikibot\page\__init__.py", line 4449, in get
data = WikibaseEntity.get(self, force=force)
File "C:\Users\admin\Documents\core\pywikibot\page\__init__.py", line 4218, in get
value = cls.fromJSON(self._content.get(key, {}), self.repo)
File "C:\Users\admin\Documents\core\pywikibot\page\__init__.py", line 3812, in fromJSON
this[key] = [Claim.fromJSON(repo, claim) for claim in claims]
File "C:\Users\admin\Documents\core\pywikibot\page\__init__.py", line 3812, in <listcomp>
this[key] = [Claim.fromJSON(repo, claim) for claim in claims]
File "C:\Users\admin\Documents\core\pywikibot\page\__init__.py", line 5387, in fromJSON
claim.type, lambda value, site: value)(value, site)
File "C:\Users\admin\Documents\core\pywikibot\__init__.py", line 1055, in fromWikibase
return cls(page, site)
File "C:\Users\admin\Documents\core\pywikibot\__init__.py", line 1026, in __init__
specifics['ending'], specifics['label'])
File "C:\Users\admin\Documents\core\pywikibot\__init__.py", line 993, in _validate
raise ValueError('Page must exist.')
ValueError: Page must exist.
CRITICAL: Exiting due to uncaught exception <class 'ValueError'>
```
An example was [[ https://www.wikidata.org/w/index.php?title=Q1126&diff=1152850489&oldid=1142404617 | Q1126 ]] (before I fixed it). Otherwise, if you find another one, it can be reproduced with:
```lang=python
>>> repo = pywikibot.Site('wikidata', 'wikidata')
>>> item = pywikibot.ItemPage(repo, 'Q1126')
>>> item.get()
```
Having this validation is fine. But it happens when you just load the item. This is similar to T226157 and T246359.