why redirect pjsip assert failed ?

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hi  all , 
   I got a pjsip assert failed  " pj_assert(call->med_prov_cnt >= local_sdp->media_count);" ,  in pjsip 2.4, my secnario  like below :

UAC--------INVITE---------------------------->(REDIRECT SRV) 

UAC<--------302 MOVED TEMPORARY-------(REDIRECT SRV) 

UAC--------ACK------->(REDIRECT SRV) 

UAC--------INVITE------->(REDIRECT SRV) 


i don't know why this happend ?  could anyone know about this happen ?  and how can i fix it ?

this  real value is below:
call->med_prov_cnt  =0
local_sdp->media_count= 2


accurately i makeCall used  callparamters with auto=1 ,and video =0 
the invte message like below :

"
INVITE sip:3100 at 172.16.200.24:5060 SIP/2.0
Via: SIP/2.0/TCP 192.168.23.138:48643;rport;branch=z9hG4bKPjc9e7175fff934f4ea922eb1dfeb6f57c;alias
Max-Forwards: 70
From: "88138" <sip:88138@192.168.17.151>;tag=353b9b83eebb4ec1a926408f2cae4041
To: <sip:3100 at 172.16.200.24>
Contact: "88138" <sip:88138 at 192.168.23.138:48624;transport=TCP;ob>;+sip.ice
Call-ID: 893d75c02e3348839c62e469800898d0
CSeq: 30448 INVITE
Route: <sip:192.168.17.151:5060;transport=tcp;lr>
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
Supported: replaces, 100rel, timer, norefersub
Session-Expires: 1800
Min-SE: 90
Content-Type: application/sdp
Content-Length:  1097

v=0
o=- 3638186779 3638186779 IN IP4 192.168.23.138
s=pjmedia
b=AS:352
t=0 0
a=X-nat:0
m=audio 50521 RTP/AVP 98 97 99 104 3 0 8 9 96
c=IN IP4 192.168.23.138
b=TIAS:64000
a=rtcp:50523 IN IP4 192.168.23.138
a=sendrecv
a=rtpmap:98 speex/16000
a=rtpmap:97 speex/8000
a=rtpmap:99 speex/32000
a=rtpmap:104 iLBC/8000
a=fmtp:104 mode=30
a=rtpmap:3 GSM/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:9 G722/8000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-16
a=ice-ufrag:7f967ff5
a=ice-pwd:4e45323b
a=candidate:Hc0a8178a 1 UDP 2130706431 192.168.23.138 50521 typ host
a=candidate:Hc0a8178a 2 UDP 2130706430 192.168.23.138 50523 typ host
m=video 50525 RTP/AVP 97 96
c=IN IP4 192.168.23.138
b=TIAS:256000
a=rtcp:50527 IN IP4 192.168.23.138
a=sendrecv
a=rtpmap:97 H264/90000
a=fmtp:97 profile-level-id=42e01e; packetization-mode=1
a=rtpmap:96 H263-1998/90000
a=fmtp:96 CIF=1;QCIF=1
a=ice-ufrag:301c0bdb
a=ice-pwd:56ae0732
a=candidate:Hc0a8178a 1 UDP 2130706431 192.168.23.138 50525 typ host
a=candidate:Hc0a8178a 2 UDP 2130706430 192.168.23.138 50527 typ host





"



thanks a lot !







Best regards.
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