Is concept of 12 years limitation period valid in partition cases

My father resided in a property which was partitioned between him and my uncle in year 1999. In year 2000 my Uncle left our city of residence and moved to Surat. My father paid him money for his portion of property but there is no entry or written document with us. Now, my uncle has moved back to our city this year and is claiming that my father did not pay him any money. In these 20 years he has not raised any claim in property and my father has been enjoying peaceful possession for all these 20 years. He even constructed 1st floor on the property in the year 2006 itself. Even than Uncle never disputed. We had rented the ground floor of the property after 2006 and uncle never even asked for rent imcome. Now in 2021 after corona his business got badly struck and he is unnecessary claiming the portion for which he has already received the money and for which he never questioned my father's peaceful possession in all these 20 years. My query is " Is his case time barred under limitations act or not ?