Here are some general safety tips to help reduce injuries when weight training. Warm up at each session with light weights.
When starting a new exercise or after laying off exercise for a week or two, start with relatively light weights.
Pay attention to joint pain. Using lighter weights and doing more repetitions might enable you to continue your session, but only if you can do so without pain.
Incorporate exercise that work agonist and antagonist pain, core, and synergist muscles to ensure balanced strength within a group of muscles and between opposing groups of muscles. Imbalances in strength can destabilize a joint.