Add more context to rpc version mismatch errors (#8271)

Fixes #5665

cmd/api-errors.go

@@ -141,6 +141,7 @@ const (
 	ErrInvalidPrefixMarker
 	ErrBadRequest
 	ErrKeyTooLongError
+	ErrInvalidAPIVersion
 	// Add new error codes here.
 
 	// SSE-S3 related API errors
@@ -1502,6 +1503,11 @@ var errorCodes = errorCodeMap{
 		Description:    "Invalid according to Policy: Policy Condition failed",
 		HTTPStatusCode: http.StatusForbidden,
 	},
+	ErrInvalidAPIVersion: {
+		Code:           "ErrInvalidAPIVersion",
+		Description:    "Invalid version found in the request",
+		HTTPStatusCode: http.StatusNotFound,
+	},
 	// Add your error structure here.
 }