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  • Chart interpolation type "stepped" has been remove in file format "ODF 1.2 extended", because such interpolation type does not exist in the standard "ODF 1.2" and LibreOffice versions prior to version 7.0 produce invalid markup in regard to chart interpolation type "stepped". The interpolation type "stepped" is available in standard "ODF 1.3". So in case you need these kind of interpolation save the document in file format "ODF 1.3" or "ODF 1.3 extended". The latter is default file format in LibreOffice 7.0. tdf#130176 core commit 58c01351 (Michael Stahl, CIB)