lock file Problem

[AnthonyPhosphate]

PEPATAC_log.txt
I have used pepatac many times before to process ATAC data, and this time I am running this pipeline but encountering same error over and over again: file lock during prealignment step

> Found lock file: /home/dongyucheng/data/ATAC/0316_hepG2/result/results_pipeline/Met200_24h-1/lock.prealignments__Met200_24h-1_rCRSd_bt_aln_summary.log
> Waiting for file lock: /home/dongyucheng/data/ATAC/0316_hepG2/result/results_pipeline/Met200_24h-1/lock.prealignments__Met200_24h-1_rCRSd_bt_aln_summary.log (03-26 11:08:35) elapsed: 0.0 _TIME_
> This indicates that another process may be executing this command, or the pipeline was not properly shut down.  If the pipeline was not properly shut down last time, you should restart it in 'recover' mode (-R) to indicate that this step should be restarted.

. I am running pepatac for the first time in the target output path, and the previous run was not interrupted. Flag in the results_pipeline shows PEPATAC_waiting.flag. Thanks for developing such a good package, hope you can help me out!

[AnthonyPhosphate]

seams the pipeline is stuck at this step
perl /home/dongyucheng/tools/pepatac/tools/filter_paired_fq.pl
htop shows a running process with zero CPU or Mem occupation.