postgres error?

Question

PHP

Good afternoon!
Execute query on Postgres database

$table_insert = pg_query($dbconn, "INSERT INTO test (col1,col2,col3,col4,col5) VALUES ('val1','val2','val3','val4','val5')");

In this case, the data is entered into the database correctly, but the error
ERROR is displayed: syntax error at end of input LINE 1: INSERT INTO test ^
What does this mean? Should I pay attention to this, because the data is saved?
Thanks in advance!