ORA-00984: columns do not allow SQL parse error location here

ORA-00984: columns do not allow SQL parse error location here

ORA-00984: The column is not allowed here
SQL parse error location

When Oracle inserts data, it always prompts that the column is not allowed here. Online Search answers that many types do not match, but my error is a low-level error. Double quotation marks are used for data insertion. Remember ......

Error:

Insert into ZP_CDC.T_WEBCHAT_QUOTATION (ID, QUOTATION_ID)
VALUES (SEQ_T_WEBCHAT_QUOTATION.nextval, "aaa ");

Correct:

Insert into ZP_CDC.T_WEBCHAT_QUOTATION (ID, QUOTATION_ID)
VALUES (SEQ_T_WEBCHAT_QUOTATION.nextval, 'aaa ');