flash twrp and custom rom in lenovo k6 power|without encryption unsuccessful problem|without error 7

hey frnds welcome to techno assylum,today i will show u how to flash twrp in a clean way without losing ur stock recovery.please note down everything u have to first open fastboot folder copy twrp img file into that and then in thst folder only press shift and right mouse button and selct open cmmnd promt here and type fastboot devices to see ur connected device then fastboot boot twrpname.img that it ur phone will boot in twrp mode then wipe cache,wipe dalvik cache and flash custom rom. fastboot file-http://viid.me/qdWc1i twrp image-https://forum.xda-developers.com/android/development/recovery-twrp-3-0-2-lenovo-vibe-k6-t3618912 stock recovery:https://www.androidfilehost.com/?fid=529152257862727093