Ubuntu22.04.1 Mobile Broadband menu always create mymodem connect after every reboot on Dell with 7560+ modem

[JinJian.Song]

Basic Info：
1. FW Packkage=18601.5001.00.01.16.30
2. Enumeration Port：wwan0at0,wwan0at1,wwan0mbim0
3. OS: Ubuntu22.04.1
4. Test SIM Card: Unicom
6 ModemManager：1.19.1
7. Libmbim:1.27.9
8. IOSM: 8.06.13
9 Kernel: 6.0
10.Log Path: attached
11.Sympthon：mymodem connection will be created in Mobile Broadband after reboot pc everytimes
12.FR=3/3
13.How to recovery: NA
14.Device: Dell with 7560+ modem

Test steps：
1. Reboot PC
2. Check Mobile BroadBand
[Expected Result]
Mobile BroadBand can not create new connections after reboot PC
[Actual Result]
mymodem connection will be created in Mobile Broadband after reboot pc everytimes

Log analysis:
We can see the info from log every reboot
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Oct 12 21:42:24 mbb-Latitude-7440 NetworkManager[789]: <info> [1665625344.7626] audit: op="connection-add" uuid="f960c196-3be4-42f2-83a8-e1b726d7f060" name="mymodem" pid=1058 uid=0 result="success"
Oct 12 21:42:24 mbb-Latitude-7440 sh[1058]: Warning: There is another connection with the name 'mymodem'. Reference the connection by its uuid 'f960c196-3be4-42f2-83a8-e1b726d7f060'
Oct 12 21:42:24 mbb-Latitude-7440 sh[1058]: Connection 'mymodem' (f960c196-3be4-42f2-83a8-e1b726d7f060) successfully added.
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