https://checkstyle.org/cmdline.html#Generating_Checks_And_Files_Suppressions_XML >Content of suppressions.xml: ``` <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE suppressions PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.2//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd"> ``` Should be `https://checkstyle.org/dtds/suppressions_1_2.dtd` Instead of `https://checkstyle.org/dtds/configuration_1_3.dtd` Generation is fixed at https://github.com/checkstyle/checkstyle/pull/17826
https://checkstyle.org/cmdline.html#Generating_Checks_And_Files_Suppressions_XML
Should be
https://checkstyle.org/dtds/suppressions_1_2.dtdInstead of
https://checkstyle.org/dtds/configuration_1_3.dtdGeneration is fixed at #17826