Hello to all FusionPBX fans! 
Again, I would like to ask a question on the topic of auto provisioning.
I understand that everyone is already tired of such questions
,...
but nevertheless, I would like to get an answer from the specialists to the next question - to perform provisioning of an IP phone in the FusionPBX WEB session (by pressing the Device ---> Provision button), is it necessary for this IP phone to be registered as an Extension in Freeswitch? That is, if the phone is not registered, then it is impossible to execute Provision from the FusionPBX WEB session?
I saw this behavior when I tested auto provisioning for the Yealink T19p phone.
If such a policy is really implemented in FusionPBX, then it is very inconvenient if I need to change the basic registration parameters (for example, the Extension number, etc.). Since the IP-phone can lose registration and it will be impossible to perform Provisioning from FusionPBX.
Or am I still wrong (I wish I were wrong)? And it is possible to perform provisioning of an IP-phone when it is not registered, but has network access from FusionPBX?
I would be very grateful to everyone for the answers.
Best regards, Sergey.

Again, I would like to ask a question on the topic of auto provisioning.
I understand that everyone is already tired of such questions

but nevertheless, I would like to get an answer from the specialists to the next question - to perform provisioning of an IP phone in the FusionPBX WEB session (by pressing the Device ---> Provision button), is it necessary for this IP phone to be registered as an Extension in Freeswitch? That is, if the phone is not registered, then it is impossible to execute Provision from the FusionPBX WEB session?
I saw this behavior when I tested auto provisioning for the Yealink T19p phone.
If such a policy is really implemented in FusionPBX, then it is very inconvenient if I need to change the basic registration parameters (for example, the Extension number, etc.). Since the IP-phone can lose registration and it will be impossible to perform Provisioning from FusionPBX.
Or am I still wrong (I wish I were wrong)? And it is possible to perform provisioning of an IP-phone when it is not registered, but has network access from FusionPBX?
I would be very grateful to everyone for the answers.
Best regards, Sergey.