• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.5.9~2.5.10
• Operating System version: any
• Java version: any

Step to reproduce this issue

response with attachments is a new feature in release 2.6.3.

but its compatible versions are set to ![2.0.10 ~ 2.6.2] while the "ProtocolVersion" had bean changed to 2.0.1 (implementation version) and 2.0.0 (specification version).

the priority of "implementation version" is greater than other in Version.getVersion.

this will cause dubbo rpc request failing from >2.5.9 to 2.6.3.

So is that a good idea to upgrade the lowest protocol version of attachment-feature to 2.0.2?

it's a big problem

Expected Result

compatible

Actual Result

fail