Setting SBTi for Carve-Outs who had existing SBTi

If a PE fund buys a business, e.g. a carve out from a larger business who has an existing SBTi, can the baseline be used from the previous parent company?

We have find often with these companies that we acquire they already have taken the 100% renewable electricity and taken steps on their supply chain. But if they have to set a new SBTi target then sometimes the reductions are not achievable within the 2030 timeframe