In the 64-bit versions of LibreOffice 25.2.4 and 25.2.5, the Data menu commands described below do not appear. The 'Handle Duplicate Records' dialog box selects/remove duplicate records in Calc. Place the active cell on some data or select some range, then Data ▸ Duplicates... This command is available in the 32-bit version 25.2.4.
Do you have your menu modified? Does the command appear in safe mode?
Hello Jerzy Moruś, I cannot confirm that the bug is present in master. Version: 25.2.4.3 (X86_64) / LibreOffice Community Build ID: 33e196637044ead23f5c3226cde09b47731f7e27 CPU threads: 12; OS: Windows 10 X86_64 (10.0 build 19045); UI render: Skia/Raster; VCL: win Locale: en-US (en_FI); UI: en-US Calc: threaded
Thank you for the suggestion. Menu Exist in safe mode. I added this by hand to menu.