LOFAR6 peak flux density vs LOFAR-IB peak or integrated flux density. The only remnant candidate is indicated in orange, restarted candidates in green, and sources from the active comparison sample in blue. Arrows indicate upper limits on flux densities. The dashed line indicates one-to-one relation, the dash-dotted line indicates a factor of 10 difference between the two flux densities at 150 MHz, while the dash-double-dot line indicates a factor of 100 difference. See Sect. 5.2 for details.