Facing Partial reconfiguration error, "Error(18853): Running Synthesis on a partial reconfiguration design at the implementation revision is illegal."

Hi, I'm trying to generate a GBS file for my custom AFU. Once the build_synth folder is created by using "afu_synth_setup -- source /path/to/filelist.txt build_synth", I'm opening dcp.qpf(cd build_...