Is there is maximum number of times a Cover Order stoploss order can be modified?

sudipto
I place Cover order for Nifty Futures through API and keep trailing the stop loss every 10 paise. After about 300 times of modification, the stoploss order does not get modified. Even if I modify the stop loss order manually, it is not modified. Is there a maximum number of times a cover order stoploss can be modified?
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