This issue is because you have a higher version of apk in one of your lower track, for example you want to upload an apk with version 1218 to production, but you have for example 1219 in your alpha track. The solution is to deactivate higher apk versions in alpha or beta tracks.
Not a long time ago we’ve released a new version of the step which has an option
Could you please check if this option is set to true in your google-play-deploy step?
Setting this option to true should automatically deactivate blocking versions of apks.
When you upload the APK using the Google Play web UI it automatically deactivates blocking versions, but the Google Play deploy API does not.