Successfully converted: 4K HDR to 4K 60FPS 8 Bit SDR but now it plays in slow motion

[4K@60FPS]

Hello,

I am converting 4K UHD HDR File to 8 bit 4K SDR @ 60 frames/sec. After conversion video colors look and sounds are fine but the new video file is now playing in slow motion (at a slowed rate of speed probably at around 0,5x of its original speed)

I wanted to ask you maybe you know how to fix this issue?

Thank you in advance.

Best Regards