MM_22682_Centralize_ID_Validation (#14237)

Co-authored-by: mattermod <mattermod@users.noreply.github.com>

model/scheme.go

@@ -107,7 +107,7 @@ func SchemesFromJson(data io.Reader) []*Scheme {
 }
 
 func (scheme *Scheme) IsValid() bool {
-	if len(scheme.Id) != 26 {
+	if !IsValidId(scheme.Id) {
 		return false
 	}