Civil suit possible?

i have sold my business to someone in 2010. I had contract with him that he will take responsibility of all claims arising in future from that particular business. (however ownership change did not happen due to some legal issues).

Now as i have done that contract in 2010 is that any provision that will offer me immunity from all claims arising of that particular business.

lets say if someone raise claim against me in 2025 , can i protect myself from that particular contract.

is that contract valid ( does it come under 3 year validation period under law)

is there any legal remedy available?

Thanks