error: cannot find PDP context for incoming packet for IP about openbts HOT 3 CLOSED

OpenBTS> audit
+---------------------------------------------------------------------+
| ERROR : Invalid Values [key current-value (default)]                |
|   To use the default value again, execute: rmconfig key             |
+---------------------------------------------------------------------+
Control.LUR.FailMode "ACCEPT" ("ACCEPT")
GSM.CCCH.BS_AG_BLKS_RES "auto" ("auto")
GSM.CCCH.BS_PA_MFRMS "2" ("2")
GSM.CallerID.Source "auto" ("auto")
NodeManager.API.PhysicalStatus "disabled" ("disabled")
SMS.MIMEType "application/vnd.3gpp.sms" ("application/vnd.3gpp.sms")

+---------------------------------------------------------------------+
| WARNING : Site Values Which Are Still Default [key current-value]   |
|   These should be set to fit your installation: config key value    |
+---------------------------------------------------------------------+
GSM.Identity.BSIC.BCC "2"
GSM.Identity.BSIC.NCC "0"
GSM.Identity.CI "10"
GSM.Identity.LAC "1000"
GSM.Identity.MCC "001"
GSM.Identity.MNC "01"
GSM.Radio.C0 "51"

+---------------------------------------------------------------------+
| INFO : Non-Default Values [key current-value (default)]             |
|   To use the default value again, execute: rmconfig key             |
+---------------------------------------------------------------------+
Control.GSMTAP.GPRS "1" ("0")
Control.LUR.NormalRegistration.Message "Welcome to the STAI network" ("")
Control.LUR.OpenRegistration ".*" ("")
Control.LUR.OpenRegistration.Message "Your IMSI is:" ("Welcome to the test network.  Your IMSI is ")
GGSN.DNS "1.1.1.1" ("")
GGSN.Firewall.Enable "0" ("1")
GGSN.Logfile.Name "/tmp/GGSN.log" ("")
GPRS.ChannelCodingControl.RSSI "-65" ("-40")
GPRS.Channels.Min.C0 "7" ("2")
GPRS.Enable "1" ("0")
GPRS.Multislot.Max.Downlink "5" ("3")
GPRS.Multislot.Max.Uplink "3" ("2")
GSM.Radio.PowerManager.MaxAttenDB "0" ("10")
GSM.Radio.RSSITarget "-75" ("-50")
GSM.Radio.RxGain "10" ("47")
Log.Level "DEBUG" ("NOTICE")
TRX.MinimumRxRSSI "-63" ("-90")

+---------------------------------------------------------------------+
| INFO : Custom/Deprecated Key/Value Pairs [key current-value]        |
|   To clean up any extraneous keys, execute: rmconfig key            |
+---------------------------------------------------------------------+
GSM.ChangeMark "11"
TRX.Reference "internal"

OpenBTS> power
current downlink power 0 dB wrt full scale