Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Attempts at a Compromise - Death of Cinna - Carbo and the New Burgesses Arm against Sulla
On the other hand Sulla's letter, which in the circumstances might be called extremely moderate, awakened in the middle-party hopes of a peaceful adjustment. The majority of the senate resolved, on the proposal of the elder Flaccus, to set on foot an attempt at reconciliation, and with that view to summon Sulla to come under the guarantee of a safe-conduct to Italy, and to suggest to the consuls Cinna and Carbo that they should suspend their preparations till the arrival of Sulla's answer. Sulla did not absolutely reject the proposals.
Of course he did not come in person, but he sent a message that he asked nothing but the restoration of the banished to their former status and the judicial punishment of the crimes that had been perpetrated, and moreover that he did not desire security to be provided for himself, but proposed to bring it to those who were at home. His envoys found the state of things in Italy essentially altered. Cinna had, without concerning himself further about that decree of the senate, immediately after the termination of its sitting proceeded to the army and urged it embarkation.
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Reference address : https://www.ellopos.net/elpenor/rome/4-09-cinna-sulla.asp?pg=27