License key versions

I have an existing 8.0.14 project. The client go additional licenses but they gave him license keys for 8.1. Will this be a problem for running version 8.0.14?

I know we licensed a 7.9 gateway before with a 8.0 license. May not be true for an 8.1 license.

Shouldn’t be problem in the short term. But note that 8.0.x is already end of life. It was not a Long-Term-Support version. You shouldn’t deploy new installs with it.