Hi, People. I am struggling with workflow which create custom record based on custom record. Workflow works and custom records is creating but I cn't see relationship between them. Is there any possibility to create relation between origin Custom Record and created Custom Records ?

On your "child" record create a custom field that is of type list/record and set it to the record type of your parent record. Ensure you tick the box that states this field is the parent. Your second record will then be a child of the first. I don't typically work with workflows but somewhat assume if you are able to create the child record setting that parent field should be straightforward.