Issue with first time saving the image caption of an image field. ( Paragraph )

Problem/Motivation

Steps to reproduce

Create a content type ( or use an existing one ) . Add a field entity reference that uses paragraphs. In the Paragraph, use a field_image that has captions enabled from the field settings. Save the changes. Then try to add a new content of this content type, insert the image, insert the image caption. Upon saving the content , the field caption will not be saved.

Proposed resolution

Create a function that does not require revision_id for checking the caption existence ( since in the database is one row per entity_type, entity_id, delta, language ) . Alter the function "image_field_caption_entity_update" in the .module file, to check firstly if the caption exists, and only then to delete it, if not move further to adding ( inserting ) the caption into the database table.