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Rapper Curren$ y‘s music is NOT to be trifled with — and to prove it … the MC is suing famed music producer Damon Dash, claiming he is hocking several Curren$ y albums without permission.

Curren$ y filed the lawsuit against Jay-Z‘s old biz partner and former co-owner of Roc-A-Fella Records — claiming he and Dash tried to negotiate an agreement to release music together in 2010 … but the deal never materialized.

Curren$ y claims Dash released two of his albums in 2010 — but the two still couldn’t reach an agreement … so Curren$ y signed with Warner Bros. in January 2011.

But according to the lawsuit, Damon was unmoved — and CONTINUED to release Curren$ y’s music despite the new WB contract, which gave WB exclusive rights to Curren$ y’s jams.

Now, Curren$ y is demanding the producer quit profiting off him in any way. Curren$ y also wants $ 1.5 million in damages.

But Damon fired back at the accusations with his own response — claiming, he has the right to release the albums in question because he was given permission. What’s more — Damon says Curren$ y stabbed him in the back, reneging on his agreement with Damon and signing with WB instead.

A judge has yet to rule on the case.