Looking up qualities

[LNChia]

Good morning,
I have this error in my log:

2021-06-02T23:48:33.962 harvester chia.harvester.harvester: WARNING Looking up qualities on F:\LN_CRYPTO\CHIA FINAL DIRECTORY_4\plot-k32-xxxx.plot took: 7.2690818309783936. This should be below 5 seconds to minimize risk of losing rewards.
2021-06-02T23:56:24.403 harvester chia.harvester.harvester: WARNING Looking up qualities on F:\LN_CRYPTO\CHIA FINAL DIRECTORY_4\plot-k32-xxxx.plot took: 7.8580029010772705. This should be below 5 seconds to minimize risk of losing rewards.

I only use one computer to plot / farm.
I have Chia 1.1.6. Also I store plots in Internal HDD, not NAS.
Could you please let me know how to decrease the look up time?
Thanks for your help!
LNChia