Currently, JaybirdTypeCodes.DECFLOAT has value -6001. Java 26 introduces JDBC 4.5, which defines java.sql.Types.DECFLOAT with a value of 2015. The first Jaybird 5 and Jaybird 6 releases after Java 26 (planned for March 2026) will need to update the value to use the JDBC-defined value.
(It needs to be updated in Jaybird 7 as well.)