While I understand that, as you've have upgraded both our core software and the add-on or even server-related items over that timespan, there may be compatibility issues there and it is best to disable them to test this or any issue you are having.
I would advise working with your hosting provider on anything which causes your MySQL database to "crash." Typically, these are server configuration issues and need to be resolved at the server-level.
Typically, another error would be presented if you are low on storage. However, ensuring you have space for the item you're uploading is a good thing to check before moving forward.
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