Yerushalmi Nedarim 11:5 ירושלמי נדרים י״א:ה׳

MISHNAH: If his wife made a vow and he was under the impression that it was his daughter, or his daughter made a vow and he was under this impression that it was his wife. If she vowed to be a nazir and he was under the impression that she vowed a sacrifice, or if she vowed a sacrifice and he was under the impression that she vowed to be a nazir. If she woved to abstain from figs and he was under the impression that it was from grapes, or if from grapes and he was under the impression that it was from figs, he shall dissolve a second time⁶⁰Since erroneous dissolutions or confirmations are invalid, the time limit for dissolution starts to run again the moment he is informed of his error..

HALAKHAH: “If she said, a qônām that I shall not taste these figs and grapes,” etc. Even if he heard and remained silent, even if he heard and confirmed⁶²This refers to Mishnah 5. Even if he had erroneously confirmed the vow, once he is informed of the true situation, he may dissolve. This is explicit in the Tosephta, 7:4..