diff --git a/.github/workflows/conan-recipe-version.yml b/.github/workflows/conan-recipe-version.yml
index 9b662e215b..ddadfe1781 100644
--- a/.github/workflows/conan-recipe-version.yml
+++ b/.github/workflows/conan-recipe-version.yml
@@ -135,9 +135,9 @@ jobs:
                             user = "_"
                             channel = "_"
                     else:
-                        if not "." in latest_branch_version.prerelease:
+                        if latest_branch_version.prerelease and not "." in latest_branch_version.prerelease:
                             # The prerealese did not contain a version number, default it to 1
-                            latest_branch_version.prerelease.append(".1")
+                            latest_branch_version.prerelease += ".1"
                         if event_name == "pull_request":
                             actual_version = f"{latest_branch_version.major}.{latest_branch_version.minor}.{latest_branch_version.patch}-{latest_branch_version.prerelease.lower()}+{buildmetadata}pr_{issue_number}_{no_commits}"
                         else: