I created a Matrix field with 1 block type called "Logo" and 2 fields inside that: 1) a related entries field and 2) an image asset. I then created a global that has this Matrix field in it that allows you to create up to 4 logo blocks in the Matrix.
When I try to create any number of logo blocks, whether I add an asset, choose an entry, or both, I get this CDb error when saving the global.
I get that the error is saying it can't locate a column of data it needs, but I don't know what the cause could be. I've tried deleting my Matrix field and global and starting over, but it's the same error each time.
I've checked the asset group for the logo images and everything seems fine: everything's named properly, no missing images, did an asset index update. No dice.
Here's a screenshot of the full error. I'm working on my local machine and the front end is unaffected.