I have a package on Atmosphere, but now I cannot update it.
If I use meteor publish --update, it says
You can't call
meteor publish --updateon version XX of package 'hongbomiao:ng2-bootstrap' without publishing it first.
However, if I use meteor publish --create, then it shows:
Package already exists. To create a new version of an existing package, do not use the --create flag!
Please help me delete it, so I can create again. Thanks!

It looks like you're trying to publish a new version of your package, is that right? In that case you should just use meteor publish without the --update. --update is for changing the readme or description of the package, not to publish a new version.
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It looks like you're trying to publish a new version of your package, is that right? In that case you should just use
meteor publishwithout the--update.--updateis for changing the readme or description of the package, not to publish a new version.