Invoke-IcingaCheckMSSQLBackupStatus: [UNKNOWN] Warning threshold range is greater than Critical threshold

[fluxX04]

icinga-powershell-mssql on version 1.5.0.

Since using the new icinga-powershell-framework on version v1.13.2. The check finishes as UNKNOWN.
This can be reproduced with the command (no parameters have been changed):

Invoke-IcingaCheckMSSQLBackupStatus -SqlUsername Icinga2 -SqlPassword (ConvertTo-IcingaSecureString 'password') -Verbosity 2

Output:

[UNKNOWN] MSSQL Backup (MSSQLSERVER) [UNKNOWN] db1, db2, db3, db4, db5, ....
\_ [UNKNOWN] db1
   \_ [OK] Age: 1h
   \_ [OK] Average Size: 38.82GiB
   \_ [OK] Execution Time: 0us
   \_ [OK] Log age: 0us
   \_ [OK] Size: 40.68TiB
   \_ [UNKNOWN] Status: Warning threshold range "6" is greater than Critical threshold range "5"
\_ [UNKNOWN] db2
   \_ [OK] Age: 1h
   \_ [OK] Average Size: 30.75GiB
   \_ [OK] Execution Time: 2m
   \_ [OK] Log age: 0us
   \_ [OK] Size: 30.75GiB
   \_ [UNKNOWN] Status: Warning threshold range "6" is greater than Critical threshold range "5"
\_ [UNKNOWN] db3
   \_ [OK] Age:1h
   \_ [OK] Average Size: 1001.43MiB
   \_ [OK] Execution Time: 0us
   \_ [OK] Log age: 0us
   \_ [OK] Size: 978.93GiB
   \_ [UNKNOWN] Status: Warning threshold range "6" is greater than Critical threshold range "5"
\_ [UNKNOWN] db4
   \_ [OK] Age: 1h
   \_ [OK] Average Size: 13.17GiB
   \_ [OK] Execution Time: 0us
   \_ [OK] Log age: 0us
   \_ [OK] Size: 12.88TiB
   \_ [UNKNOWN] Status: Warning threshold range "6" is greater than Critical threshold range "5"
\_ [UNKNOWN] db5
   \_ [OK] Age: 1h
   \_ [OK] Average Size: 1.60GiB
   \_ [OK] Execution Time: 0us
   \_ [OK] Log age: 0us
   \_ [OK] Size: 1.57TiB
   \_ [UNKNOWN] Status: Warning threshold range "6" is greater than Critical threshold range "5"
.....

Performance data for state: dbX::ifw_mssqlbackupstatus::state=0;6;5;;

Greetz