TMS570LS3137: F021 FLASH Fapi_initializeFlashBanks function returns the error Fapi_Error_OtpChecksumMismatch

HI:

      I am debugging the tms570ls3137 flash with F021, and I found that the Fapi_initializeFlashBanks function returns the error Fapi_Error_OtpChecksumMismatch. However, with the same code, I have no problem on the TMS570LC4357 development board, and I can perform flash read and write operations normally.

The code is as follows:
ret = (Fapi_initializeFlashBanks((uint32_t)SYS_CLK_FREQ));
if (ret == Fapi_Status_Success)

thanks