[SOLVED] WDS client won't stay connected (PREV_AUTH_NOT_VALID) using recent snapshot builds

1 - git clone … openwrt.git
2 - scripts/feeds update -a & install -a
3 - get xback-9dd6b51.tar.gz , extract & overwrite openwrt forder
4 - compilation with my old .config for WR1200JS

update firmware ( 2 * WR1200JS master and client WDS ) and no problem exactly as with x-wrt firmware