Air-ct5500-k9-8-3-150-0 -

was designed to support medium-to-large-scale enterprise wireless deployments.

You cannot jump from a prehistoric version (e.g., 7.0.116) directly to 8.3.150.0. Doing so will brick the controller's bootloader. air-ct5500-k9-8-3-150-0

config boot primary <filename>