It seems you have an orphaned id somewhere and we will need a bit more information to pin point the cause. Can you please do the following:
1) Reproduce the error and attach your error.log
2) Check the sf_page_nodes and sf_page_data if there actually is an item with this id and what the results are when you look for it.
3) Trace us back any steps that may have lead to the issues. What kind of work was done since yesterday
and what kind of changes were made.
4) Does it occur on every page and/or template or just specific ones
Thanks for the information!
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