Do you know your way around a SQL database? If so, take a look at the table that gets created when the module is installed, it is probable that the table is not removed when the module is uninstalled. But I guess you could also contact sangoma support, as PMS is supposed to be a commercial module if I recall correctly.
I fixed that.
Now we are not able to enter any uknown code. If the code doesn’t exist, the call is canceled or ask to enter a code again.
If the code is messed up for any reason, it will be removed.
Also I fixed the fact when we uninstall SPM, the data in asterisk db are removed as well.
Wait the publishing and new release (edge or stable).