Graphs for Custom OIDs

Hi

I finally needed to use this thing called a Custom OID.
all data is filled, the test will pass.
in the settings I see that the value from the snmp is obtained, but the graphs are not available. during the investigation it turned out that the graph has a different name.

Here are the settings:

this is what the web is asking for:

and here is what is in the RRD storage

as you can see - the RRD names are different.
if you change the name in the storage to what the web asks for - the graphs are displayed normally.

my validate:

upd. renaming solves the problem.

ethernet0/17/0 rx power → ethernet0_17_0 rx power

but I would like either a solution for the problem so that slashes work or some workaround: either autoreplacement or a description that slashes should not be used