A querent drawing this changing line has usually taken on a grievance, a debt or a failure that has been sitting untouched for a long time, and is discovering that age has made it unpleasant rather than simply difficult. The poison in the dried meat is the part nobody warned about: old resentments attached to the matter, people who have since taken sides, or a history that makes any clean resolution impossible. Something will be swallowed here that the querent would rather not have swallowed.
The line's value is in what it declines to say. It does not advise abandoning the effort, and it does not promise the effort will be pleasant. It says the regret will be small and the blame will not attach. For anyone hesitating over whether an old matter is worth reopening, that is a qualified yes, delivered with an honest warning about the aftertaste.
The stroke's placement, yielding in a firm position at the top of the lower trigram Zhen, tells a querent where the friction is coming from. This is the reading for acting without full authority to act, raising something one is not formally positioned to raise. Doing so is not condemned here, but it does explain why the case resists. If the standing can be obtained before the matter is pressed further, the fourth line's harder work becomes possible; without it, the querent should expect to absorb the unpleasantness personally.