EVENT:10226 trace CR applications of undo for data

Error:  ORA 10226
Text:   trace CR applications of undo for data operations
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Explanation:
        This is NOT an error but is a special EVENT code. It can be used
        to signal Oracle to perform SQL_TRACE actions.

	This event causes application of UNDO for producing CR copies of
	blocks. It can produce a lot of output (in the form of REDO
	application dump to rewind the block)