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JPA: Cascade delete for join tables with composite key

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I am having an issue where I have table B has a manytomany relationship to table C and table D. I am using a table B_has_C_and_D to link.

I would like to be able to delete a row in table C and have the relationship also delete the row in table "B_has_C_and_D"

Entity B:

Entity bHasCAndD:

Entity C:

Entity D:

I figure I have something just misconfigured. Anyone have any ideas/recommendations?
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What is the issue? What error or incorrect behavior are you seeing?

In general the cascade=ALL should cause the related B_C_D object to be deleted if you call remove() on C.
What is your code doing exactly?
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