The schemaorg entry is deleted if no data has been received from the form

[MSGroupFM]

Steps to reproduce the issue

When saving materials in Joomla 5.1 not through the standard form of the control panel (for example, YOOtheme Pro), the schemaorg is deleted.

Expected result

The schemaorg plugin should ignore form submission without a schema.

Actual result

Schemaorg plugin removes a record from a table _schemaorg

System information (as much as possible)

Joomla 5.1

Additional comments