Question: When an AF modifies a BDT warning notification request indication (with features "BdtNotification_5G" and "PatchCorrection" supported), what action does the NF service consumer take regarding the "warnNotifReq" attribute in the HTTP PATCH request to the PCF if the BDT warning notification is again required?
Option 1: Set the value of the "warnNotifReq" attribute to a new custom value "pending".
Option 2: Set the value of the "warnNotifReq" attribute to "true".
Option 3: Remove the "warnNotifReq" attribute from the "bdtReqData" attribute.
Option 4: Set the value of the "warnNotifReq" attribute to "null".
Explanation: According to the procedure for modifying a BDT warning notification request indication, when the BDT warning notification is again required, the NF service consumer must explicitly indicate this by setting the "warnNotifReq" attribute to "true", ensuring the PCF understands the updated requirement and can appropriately update the UDR if necessary, directly impacting telecom session management and policy control.