No.
Paul was continuing what the first Apostles had learnt.
It just proves that every believer has to have personal revelation of the truth from the Lord Himself as Paul did, who obeyed the same gospel as all others before him to be saved.
Act 15:7 And when there had been much disputing, Peter rose up, and said unto them, Men and brethren, ye know how that a good while ago God made choice among us, that the Gentiles by my mouth should hear the word of the gospel, and believe.
Act 15:8 And God, which knoweth the hearts, bare them witness, giving them the Holy Ghost, even as he did unto us;
Act 15:9 And put no difference between us and them, purifying their hearts by faith.
Act 15:10 Now therefore why tempt ye God, to put a yoke upon the neck of the disciples, which neither our fathers nor we were able to bear?
Act 15:11 But we believe that through the grace of the Lord Jesus Christ we shall be saved, even as they.