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Extensive surveys of star-forming regions with Spitzer have revealedpopulations of disk-bearing young stellar objects. These have provided crucialconstraints, such as the timescale of dispersal of protoplanetary disks,obtained by carefully combining infrared data with spectroscopic or X-ray data.While observations in various regions agree with the general trend ofdecreasing disk fraction with age, the Lupus V and VI regions appeared to havebeen at odds, having an extremely low disk fraction. Here we show, using therecent Gaia data release 2 (DR2), that these extremely low disk fractions areactually due to a very high contamination by background giants. Out of the 83candidate young stellar objects (YSOs) in these clouds observed by Gaia, onlyfive have distances of 150 pc, similar to YSOs in the other Lupus clouds, andhave similar proper motions to other members in this star-forming complex. Ofthese five targets, four have optically thick (Class II) disks. On the onehand, this result resolves the conundrum of the puzzling low disk fraction inthese clouds, while, on the other hand, it further clarifies the need toconfirm the Spitzer selected diskless population with other tracers, especiallyin regions at low galactic latitude like Lupus V and VI. The use of Gaiaastrometry is now an independent and reliable way to further assess themembership of candidate YSOs in these, and potentially other, star-formingregions.

Gaia DR2 view of the Lupus V-VI clouds: the candidate diskless young stellar objects are mainly background contaminants