Not able to flash any custom recovery on my GALAXY A7(2015) A700FD

I'm running on stock rom Marshmallow on GALAXY A7(A700FD).
I have installed TWRP recovery properly and its working properly .
Problem is i cant flash any custom ROM via TWRP. It keeps generating error that "Can't install zip on top of incompatible data"
or "Unable to mount /data "
or "Unable to mount /system"
or "Unable to install ******.zip".


I have tried many different versions of TWRP and tried with CM13 for A700FD and Ressuraction ROM for A700FD but none of them seem to work . I can't install any zip from TWRP!! HELP PLEASE!
THANK YOU

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