Got error: [FATAL] Cannot load field defs for Task/Opportunities/ForecastWorksheet

Hi all,

I got this error every second that make log is big

and it shows 3 lines of the same pattern.

Wed Dec  9 02:31:04 2015 [11773][1][FATAL] Cannot load field defs for Task

Wed Dec  9 02:31:04 2015 [11773][1][FATAL] Cannot load field defs for Opportunity

Wed Dec  9 02:31:04 2015 [11773][1][FATAL] Cannot load field defs for ForecastWorksheet

Wed Dec  9 02:31:05 2015 [10899][1][FATAL] Cannot load field defs for Task

Wed Dec  9 02:31:05 2015 [10899][1][FATAL] Cannot load field defs for Opportunity

Wed Dec  9 02:31:05 2015 [10899][1][FATAL] Cannot load field defs for ForecastWorksheet

Do you have any idea to investigate this error?

SugarCRM Enterprise, Version 7.5.2.0

Thank you,

M