No, deleting a source from an imported profiles column will not corrupt your existing data in the table. When you delete a source, it simply removes that particular source from your table, but the data that was previously imported remains intact.
It's important to note that if you edit or modify a source before deleting it, your already imported results will not change.
If you need to delete a source, you can do this by:
1. Click on the Source Column
2. Select "Sources" from the menu
3. Click on the source you want to delete
4. Click "Delete source" in the panel that opens