Moving Asset from one Volume to another doesn't clear Custom Field data

[stevehurst]

Description

I ran into this using Image Optimize which stores its array of images in a custom field.

One asset volume has the custom field, the other doesn't. I moved my assets from the volume with the custom field to the other without it, and the data persists in the database causing conditionals to return true and the Image Optimize plugin to not be able to process the unknown field:

Impossible to invoke a method ("src") on a string variable ("{"optimizedImageUrls":{"292":"/images/content/_292x293_crop_center-center_line/AA1.png"},"optimizedWebPImageUrls":{"292":"/images/content/_292x293_crop_center-center_line/AA1.png.webp"},"variantSourceWidths":["292"],"variantHeights":{"292":293},"focalPoint":{"x":0.5,"y":0.5},"originalImageWidth":"292","originalImageHeight":"293","placeholder":"","placeholderSvg":"","colorPalette":[],"placeholderWidth":292,"placeholderHeight":293}").

I contacted Andrew about this and he suggested this was possibly part of a bigger issue of Craft not clearing custom field data on asset changes.

I can see where keeping this data might be useful when transferring assets around volumes, and back again, but there's no way to clear the data otherwise.

[brandonkelly]

This is the same core issue described in #1898 and #1772. Will be resolved when we get to #1524 (planned for 3.2).