Plant foods are not equivalent to organ meat
Beans and lentils contain purines, but epidemiological evidence does not support treating purine-rich vegetables and pulses as equivalent to high-purine animal foods.
They can still be useful foods
Pulses provide fibre, protein and micronutrients and can fit into a balanced dietary pattern.
Track repeat personal patterns, not internet rules
If you repeatedly notice the same association, record it alongside the rest of your context rather than assuming one meal proves causation.