course 18.021.1x+3T2023 won't load in studio

[sentry-io]

I guess this isn't an issue until we hear from the course team, but it seems like https://studio.mitxonline.mit.edu/course/course-v1:MITxT+18.02.1x+3T2023 throws a 500 error every time you try to load it.

Sentry Issue: OPENEDX-MITXONLINE-96G

ItemNotFoundError: BlockKey(type='p', id='p_f1505e0b36ba')
(22 additional frame(s) were not displayed)
...
  File "cms/djangoapps/contentstore/xblock_storage_handlers/view_handlers.py", line 1203, in create_xblock_info
    if xblock.subtree_edited_on
  File "xmodule/modulestore/edit_info.py", line 41, in subtree_edited_on
    return self.runtime.get_subtree_edited_on(self)
  File "xmodule/modulestore/split_mongo/caching_descriptor_system.py", line 353, in get_subtree_edited_on
    self._compute_subtree_edited_internal(
  File "xmodule/modulestore/split_mongo/caching_descriptor_system.py", line 387, in _compute_subtree_edited_internal
    child_data = self.get_module_data(BlockKey(*child), course_key)
  File "xmodule/modulestore/split_mongo/caching_descriptor_system.py", line 149, in get_module_data
    raise ItemNotFoundError(block_key)

[pdpinch]

no idea how this got fixed, but it's working now.