Contradiction with Jeremiah 38:20
Jeremiah advises submission to the Babylonians to save the people, contradicting any promise of deliverance without compliance.
Jeremiah 38:20: But Jeremiah said, They shall not deliver [thee]. Obey, I beseech thee, the voice of the LORD, which I speak unto thee: so it shall be well unto thee, and thy soul shall live.
Contradiction with Jeremiah 29:11
This verse promises plans for peace and a hopeful future, which contrasts with Jeremiah 38:21's warning of dire consequences for disobedience.
Jeremiah 29:11: For I know the thoughts that I think toward you, saith the LORD, thoughts of peace, and not of evil, to give you an expected end. [expected...: Heb. end and expectation]