Revert "fix while loop issue when delete keys in sepcified slot."
Revert "fix while loop issue when delete keys in sepcified slot."

This reverts commit 35b8b8d212fa8ca63ed70728bf144912d74ab8de.

JRHZRD/swapdb,JRHZRD/swapdb,JRHZRD/swapdb,JRHZRD/swapdb,JRHZRD/swapdb,JRHZRD/swapdb,JRHZRD/swapdb,JRHZRD/swapdb