Error in version 2.8.3

ffmpeg -y \
-ss 0 -i testdata/video.webm \
-ss 0 -i backingtrack.mp3 \
-ss 0 -i testdata/audio.wav \
-i overlay.png \
-i suffix.mp4 \
-filter_complex \
\
	"[1:a][2:a] amix=inputs=2:duration=shortest [mergedAudio]; \
	[mergedAudio] asplit=3 [fullAudio][a1][a2]; \
	[a1] atrim=0:2 [vineAudio]; \
	[a2] atrim=0:4 [instagramAudio]; \
	[0]setpts=PTS-STARTPTS[video]; \
	[video][3]overlay[overlayed]; \
	[4]setpts=PTS-STARTPTS[suffix]; \
	[suffix] split=3 [suffix1][suffix2][suffix3]; \
	[overlayed] split=3 [fullIn][instagramIn][vineIn]; \
	[vineIn] trim=0:2 [vineOut]; \
	[instagramIn] trim=0:4 [instagramOut]; \
	[fullIn][suffix1] concat=n=2:v=1:a=0 [full]; \
	[vineOut][suffix2] concat=n=2:v=1:a=0 [vine]; \
	[instagramOut][suffix3] concat=n=2:v=1:a=0 [instagram]" \
\
-acodec libvorbis -b:a 128k -ac 2 -r 25 -vcodec libvpx -b:v 1024k \
-map [full] -map [fullAudio] testdata/output/full.webm \
-map [instagram] -map [instagramAudio] testdata/output/instagram.webm \
-map [vine] -map [vineAudio] testdata/output/vine.webm

---- ERROR ----
[audio format for output stream 0:1 @ 0xbc74960] Cannot select sample rate for the link between filters audio format for output stream 0:1 and output stream 0:1.

---- COMPLETE OUTPUT -----

ffmpeg version 2.8.3-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 5.2.1 (Debian 5.2.1-26) 20151125
  configuration: --enable-gpl --enable-version3 --disable-shared --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls --enable-libvidstab --enable-libsoxr --enable-frei0r --enable-libfribidi --disable-indev=sndio --disable-outdev=sndio --cc=gcc
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, matroska,webm, from 'testdata/video.webm':
  Metadata:
    encoder         : whammy
  Duration: 00:00:08.08, start: 0.000000, bitrate: 2097 kb/s
    Stream #0:0: Video: vp8, yuv420p, 480x320, SAR 1:1 DAR 3:2, 1k tbr, 1k tbn, 1k tbc (default)
[mp3 @ 0xbc38740] Skipping 0 bytes of junk at 4096.
[mp3 @ 0xbc38740] Estimating duration from bitrate, this may be inaccurate
Input #1, mp3, from 'backingtrack.mp3':
  Metadata:
    TSS             : Logic 10.2.0
  Duration: 00:00:08.07, start: 0.000000, bitrate: 164 kb/s
    Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 160 kb/s
Guessed Channel Layout for  Input Stream #2.0 : stereo
Input #2, wav, from 'testdata/audio.wav':
  Duration: 00:00:08.92, bitrate: 1411 kb/s
    Stream #2:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
Input #3, png_pipe, from 'overlay.png':
  Duration: N/A, bitrate: N/A
    Stream #3:0: Video: png, rgba(pc), 480x320 [SAR 2835:2835 DAR 3:2], 25 tbr, 25 tbn, 25 tbc
Input #4, mov,mp4,m4a,3gp,3g2,mj2, from 'suffix.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf55.33.100
  Duration: 00:00:01.57, start: 0.000000, bitrate: 117 kb/s
    Stream #4:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 480x320 [SAR 1:1 DAR 3:2], 111 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
[audio format for output stream 0:1 @ 0xbc74960] Cannot select sample rate for the link between filters audio format for output stream 0:1 and output stream 0:1.
Error configuring complex filters.
Invalid argument