T48G v73.0.50 - "%NULL%" showing for values

[Flora_Yealink]

Hello
I have tested it in my side,it can work well .
If you configure the value with %NULL% or !NULL! will default the parameter to default value .
But if you configure it with "%NULL%" means you want to configure the parameter with the value "%NULL%".
so if check if your provisioning file used "%NULL%", if yes, please change it with %NULL% , delete the quotes.

The correct setting :
linekey.2.line = 1
linekey.2.value = 123
linekey.2.pickup_value = 124
linekey.2.type = 16
linekey.2.xml_phonebook =
linekey.2.label = %NULL%

Incorrect setting.
linekey.3.line = 1
linekey.3.value = 1233
linekey.3.pickup_value = 1243
linekey.3.type = 16
linekey.3.xml_phonebook =
linekey.3.label = "%NULL%"
please check and let us know if any question.
Best Regards!

Flora