palinody
/ˈpalɪnəʊdi/noun
An ode or song in which the author retracts a view or sentiment expressed in a former poem; (more generally) a recantation or retraction, especially of a formal kind.
Origin
Late 16th century; earliest use found in Brian Melbancke (d. 1600), writer. From (i) Middle French, French palinodie ode or song in which the author retracts a view or sentiment expressed in a former poem, retraction.