SQL0802 Type 12 using LISTAGG

I'm using LISTAGG to combine a char(64) field from an unknown number of rows into a single row with one large character field.

It works until I exceed the limit for a varying length field (I'm reading 4000 characters).

The source is a "notes" table in our legacy ERP. So I'm trying to present the notes in a large text field.
I'm attempting to insert the results into a new table containing a CLOB field/column.
Eventually, I would like to put a "new line" character after each row as well (if possible).

I cannot get past this error:
[SQL0802] Data conversion or data mapping error. Cause . . . . . : Error type 12 has occurred.
12 -- Result of a concatenation operation on a varying-length field exceeded the maximum allowed length of the result type.

Suggestions welcomed.

Thanks,
Greg
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