OpenDistro Index Management

[Gustascern]

Hello,
I'm trying to set up opendistro index management and for some reason i keep getting "index name [metricbeat-7.12.1-2022.03.08] does not match pattern '^.*-\d+$'" error in console window.

When I try to change the index to match the pattern, I get an error that you cant use those symbols (Invalid index name [filebeat-8.0.0-2022.02.28-/d], must not contain the following characters [ , ", , , <, |, ,, >, /, ?]")

So basically these two terms are contradicting themselves, is there some sort of mistake or am i missing something. In the older Elasticsearch I have been using, the pattern is '^.-\d+$', so without the double slashes, which accepts my pattern. Could it be that the slash was added by accident?