Lenovo tab 2 a7-30hc

I have Lenovo tab 2 a7-30hc Android 5.0.1 rooted I tried to flash sdk21-arm / sdk21-arm64 or sdk-x86 it's all keeps showing install aborted I tried rom manger twrp I changed the settings classic / recovery automatic and manual nothing work it keeps showing install aborted what should I do ? And If it need custom recovery help me or give me a link
Thanks in advance for your time

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