Throughout the codebase there are several different versions of Solidity being targeted by the source files. In some cases ranges are accepted via the ^ operator.

It is recommended to specifically target only one Solidity version in the source code. 0.8.10 is the newest out of the users versions. Also, do not use the ^ caret operator. Ranged Solidity compilation versions are discouraged as to not introduce slight variations that initially do not appear as breaking changes, or compiler changes that may have undiscovered vulnerabilities.