On Service Releases you don’t need to convert data but on a ‘point release’ or a ‘version release’ you usually do. Version release being v5, v6, v7, etc. Point release being v6.0, v6.1, v6.2, v6.3, etc. Service release being v6.2.0, v6.2.1, v6.2.2, v6.2.3, v6.2.4, etc.
For Example:
Going from v5.1.2 to v6.0.0 would require conversion.
Going from v6.0.0 to v6.1.0 requires conversion.
Going from v6.1.0 to v6.2.0 requires conversion. (and so on)
