Refresh rate KDE5

Hello!

Why option refresh rate 75Hz is disappeared? :mad:

system:
Code:OS: Slackware 14.2 x86_64 (post 14.2 -current) x86_64
Kernel: 5.10.7
Resolution: 1920x1080
DE: Plasma 5.20.5
WM: KWin
CPU: Intel Xeon E3-1246 v3 (8) @ 3.900GHz
GPU: Intel HD Graphics
Memory: 1489MiB / 15667MiBCode:$ xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
HDMI1 disconnected primary (normal left inverted right x axis y axis)
HDMI2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 530mm x 300mm
1920x1080 60.00*+ 50.00 59.94 59.99
1920x1080i 60.00 50.00 59.94
1680x1050 59.88
1280x1024 75.02 60.02
1440x900 59.90
1280x960 60.00
1366x768 59.79
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)Thank you in advance!
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