Command Bar Subwoofer not pairing

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Hi all,
Bought Command Bar 20 days ago and it works fine.
So, I don't know why and when, two days ago I see (and heard) that the sub doesn't work and it seems that it lost pairing with the Soundbar (that continues to work fine).
I try to re-pair, but it doesn't work.

I try to syncronize them in any way. With my home wifi off, shut down soundbar and subwoofer and put on first the soundbar and after the sub. Nothing.

I don't see any indications or Faq for this problem?

May you help me please?

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