Oracle : Ошибка ORA-30004

"when using SYS_CONNECT_BY_PATH function, cannot have separator as part of column value"
*Cause: A column value contained the string that the SYS_CONNECT_BY_PATH
function was to use to separate column values.
*Action: Specify another separator for the SYS_CONNECT_BY_PATH function
to use which does not occur in any column value, then retry.

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