correct format and increment for version and build code version values

I'm using the platform command line tool for apk uploads of our Go application to the oculus distribution platform. I'm having trouble correctly incrementing the version number and/or the build version code to that the apk is excepted. I'm getting the message that there is an apk with the same platform number and version code on the channel I'm uploading to. Incrementing the build code version doesn't seem to resolve the issue, and I have 1.01 as the version number - adding 1.011 to the number also doesn't seem to work. What are the accepted values for these properties?