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Bon Jovi fans livin' on the prayer that Richie Sambora will tour with the band next year are going to be crushed ... 'cause TMZ has learned a full reunion isn't in the group's future.

Here's the deal ... after Bon Jovi announced their "Forever" tour scheduled for next summer, fans flocked to social media, totally convinced the group would bring Richie back for a show or two.

However, sources with direct knowledge tell us fans who are trying to "Never Say Goodbye" to Sambora are delusional ... because we're told such a reunion isn't going to happen. Ever. Getty

Our sources say Richie and Jon Bon Jovi get along fine enough, at this point ... but, Richie isn't going to tour with the group.

Sambora left the group almost 15 years ago, and our sources point out ... th

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