Some thoughts about multiple editions of J.-P. Migne's "Patrologia Latina": https://www.jdavidstark.com/fun-with-multiple-editions-of-mignes-patrologia-latina/ #patristics
Fun with multiple editions of Migne’s Patrologia Latina | J. David Stark

There are a pair of references in Cranfield's (affiliate disclosure) and Moo's (affiliate disclosure) Romans commentaries to comments by Ambrosiaster about the origin of the Christian community in Rome, and I've been curious to give this reference a look. Both authors cite the reference as found in J.-P. Migne's Patrologia latina, vol. 17, col. 46 (Cranfield,

J. David Stark | Hone Your Craft as a Biblical Scholar