Teaching with Moodle

Training calendar disappeared entirely

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Training calendar disappeared entirely

I deleted a course from a course category and it caused the training calendar (separate section on home page, not the default calendar on Moodle) to disappear entirely. In the place of where the calendar used to be is the following error: Can not find data record in data base table course.

I am just a Moodle administrator, not a developer. Can any developers please tell me if this is a major issue or is it easily fixed? I am quite worried.

Any advice? Thanks a million.

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