If this flag is set, CTxIn::nSequence is NOT interpreted as a relative lock-time. It skips SequenceLocks() for any input that has it set (BIP 68). It fails OP_CHECKSEQUENCEVERIFY/CheckSequence() for any input that has it set (BIP 112).
Declared in <primitives/transaction.h>
inline constexpr static
uint32_t SEQUENCE_LOCKTIME_DISABLE_FLAG = {1U << 31};