How to update lookup field value in cds using power automated
You can try this.
It is the GUID of the entry to which you would be linking
Also, the contacts(GUID) means looking up to Contacts. Each entity will have its own.
you need to get the GUID from the entity you are linking up to. For example for Contact you will find it in contactid.
There are many ways to get GUID of a record. for example, you can get the id from the URL of the record.
eg, for a contact record, we can see it as